Low frequency of CYP21B deletions in Brazilian patients with Congenital Adrenal Hyperplasia due to 21-hydroxylase deficiency - Bachega, T A; Billerbeck, A E; Madureira, G; Arnhold, I J; Medeiros, M A; Marcondes, J A; Longui, C A; Nicolau, W; Bloise, W; Mendonca, B B (Hum Hered, 1999)